You can 改变这个事实, before replace the timer, try this, take apart the front panle. flip it open, Locate the timer motor,spray WD40 to the mortor shaft, (the shaft it may coverd by a motor I/D label) after spray WD40, wait for few minutes and "hit" it slightly with a screw driver handle. In most case is the time motor lack of lubrication and it is got "stuck", the timer never turn, there for no electrical contact were make to run the dryer, machine cycle never start
Timer rear view, the around one with two wire is the motor,motor shaft is covered by a lable,